Fix tests for Jenkins that always build for iOS

Sources/ResgenSwift/Strings/Twine/Twine.swift

@@ -22,8 +22,14 @@ struct Twine: ParsableCommand {
     
     static let toolName = "Twine"
     static let defaultExtensionName = "String"
-    static let twineExecutable = "\(FileManager.default.homeDirectoryForCurrentUser.relativePath)/scripts/twine/twine"
-    
+    static let twineExecutable: String = {
+        #if os(macOS)
+        "\(FileManager.default.homeDirectoryForCurrentUser.relativePath)/scripts/twine/twine"
+        #else
+        fatalError("This command should run on Mac only")
+        #endif
+    }()
+
     // MARK: - Command Options
     
     @OptionGroup var options: TwineOptions

Sources/ToolCore/Shell.swift

@@ -12,35 +12,13 @@ public class Shell {
     public static var environment: [String: String] {
         ProcessInfo.processInfo.environment
     }
-    
-//    @discardableResult
-//    public static func shell(launchPath: String = "/usr/bin/env", _ args: String...) -> (terminationStatus: Int32, output: String?) {
-//        let task = Process()
-//        task.launchPath = launchPath
-//        task.arguments = args
-//
-//        var currentEnv = ProcessInfo.processInfo.environment
-//        for (key, value) in environment {
-//            currentEnv[key] = value
-//        }
-//        task.environment = currentEnv
-//
-//        let pipe = Pipe()
-//        task.standardOutput = pipe
-//        try? task.run()
-//        task.waitUntilExit()
-//
-//        let data = pipe.fileHandleForReading.readDataToEndOfFile()
-//
-//        guard let output: String = String(data: data, encoding: .utf8) else {
-//            return (terminationStatus: task.terminationStatus, output: nil)
-//        }
-//
-//        return (terminationStatus: task.terminationStatus, output: output)
-//    }
-    
+
     @discardableResult
-    public static func shell(launchPath: String = "/usr/bin/env", _ args: [String]) -> (terminationStatus: Int32, output: String?) {
+    public static func shell(
+        launchPath: String = "/usr/bin/env",
+        _ args: [String]
+    ) -> (terminationStatus: Int32, output: String?) {
+        #if os(macOS)
         let task = Process()
         task.launchPath = launchPath
         task.arguments = args
@@ -63,5 +41,8 @@ public class Shell {
         }
         
         return (terminationStatus: task.terminationStatus, output: output)
+        #else
+        fatalError("Shell is only available on Mac")
+        #endif
     }
 }

Sources/ToolCore/StringExtensions.swift

@@ -60,7 +60,11 @@ public extension String {
     
     func replaceTiltWithHomeDirectoryPath() -> Self {
         // See NSString.expandingTildeInPath
+        #if os(macOS)
         replacingOccurrences(of: "~", with: "\(FileManager.default.homeDirectoryForCurrentUser.relativePath)")
+        #else
+        fatalError("This command should run on Mac only")
+        #endif
     }
     
     func colorComponent() -> (alpha: String, red: String, green: String, blue: String) {